@Tfmonkey Anecdotal report on farming situation in my neck of the woods. Did a small road trip recently and in my area (where farming most certainly makes up most of the land use), and I did see almost every field having crops growing.
Not saying you are wrong about many farms not having planted crops, and maybe the effects you are describing will be delayed later. But at the very least, the fertilizer issues have not become much of a factor yet in my area.